netdev - Re: [PATCH v2,1/1] net/hyperv: Fix the code handling tx busy

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Message-ID: <1332192191.9397.62.camel@edumazet-glaptop>
Date:	Mon, 19 Mar 2012 14:23:11 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Haiyang Zhang <haiyangz@...rosoft.com>
Cc:	kys@...rosoft.com, davem@...emloft.net, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, devel@...uxdriverproject.org
Subject: Re: [PATCH v2,1/1] net/hyperv: Fix the code handling tx busy

On Mon, 2012-03-19 at 14:23 -0700, Haiyang Zhang wrote:
> Instead of dropping the packet, we keep the skb buffer, and return
> NETDEV_TX_BUSY to let upper layer retry send. This will not cause
> endless loop, because the host is taking data away from ring buffer,
> and we have called the stop_queue before returning NETDEV_TX_BUSY.
> 
> The stop_queue was called in the function netvsc_send() in file 
> netvsc.c, then it returns to rndis_filter_send(), which returns to
> netvsc_start_xmit() in file netvsc_drv.c. So the NETDEV_TX_BUSY is
> indeed returned AFTER queue is stopped.
> 
> Signed-off-by: Haiyang Zhang <haiyangz@...rosoft.com>
> Reviewed-by: K. Y. Srinivasan <kys@...rosoft.com>
> ---

Thanks 

Acked-by: Eric Dumazet <eric.dumazet@...il.com>


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